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Theory of Plate TectonicsPlate Boundaries Causes of Plate Tectonics
What is Plate TectonicsThe Earth’s crust and upper mantle are broken into sections called plates Plates move around on top of the mantle like rafts
What is the Lithosphere?The crust and part of the upper mantle = lithosphere 100 km thick Less dense than the material below it so it “floats”
What is the Asthenoshere?The plastic layer below the lithosphere = asthenosphere The plates of the lithosphere float on the asthenosphere
2 Types of Plates Ocean plates - plates below the oceans Continental plates - plates below the continents
Questions... What is the theory of plate tectonics?What is the lithosphere? What is the asthenosphere? What is the connection between the two? What are the two types of plates?
Divergent Boundaries Boundary between two plates that are moving apart or rifting RIFTING causes SEAFLOOR SPREADING
Features of Divergent BoundariesMid-ocean ridges rift valleys fissure volcanoes
Convergent BoundariesBoundaries between two plates that are colliding There are 3 types…
Type 1 Ocean plate colliding with a less dense continental plateSubduction Zone: where the less dense plate slides under the more dense plate VOLCANOES occur at subduction zones
Andes Mountains, South America
Type 2 Ocean plate colliding with another ocean plateThe less dense plate slides under the more dense plate creating a subduction zone called a TRENCH
Aleutian Islands, Alaska
Type 3 A continental plate colliding with another continental plateHave Collision Zones: a place where folded and thrust faulted mountains form.
Transform Fault BoundariesBoundary between two plates that are sliding past each other EARTHQUAKES along faults
San Andreas Fault, CA
Questions... What are the three types of boundaries?What direction do plates go for each? Which boundary has a subduction zone…what occurs at a subduction zone?
Causes of Plate Tectonics
Convection Currents Hot magma in the Earth moves toward the surface, cools, then sinks again. Creates convection currents beneath the plates that cause the plates to move.
Questions... What causes plates to move?How is a convection current formed?
Types of Plate Boundaries
The Theory of Plate Tectonics - Boundaries, Stresses, and Faults
Aim: How do the plates of the Earth move? Do Now: Using the worksheet, “Plate Movement: In out and Sideways”, answer the following questions below. - What.
Theory of Plate Tectonics
Factors that Cause Tectonic Plate Movement
Plate Tectonics. Plate Tectonics What is Plate Tectonics The Earth’s crust and upper mantle are broken into sections called plates Plates move around.
Bellringer Make your voc foldable Homework: Illistrations
Plate Tectonics Lithosphere- 60 miles thick (crust and upper part of the mantle.) It is the solid outer layer of earth made up of tectonic plates. Plate.
Theory of Plate Tectonics Plate Tectonics Plate Boundaries Causes of Plate Tectonics.
Plate Tectonics Causes of Plate Tectonics Plate Boundaries.
Sixth grade Ms. Martinez. “You are on a journey to the center of the Earth with friends. Write about your journey describing what the inside of the.
Warm-Up Find the mistakes!
Theory of Plate Tectonics Theory that pieces of lithosphere move around on top of the asthenosphere.
Continental Drift Theory
Plate Tectonics Plate Boundaries Causes of Plate Tectonics.
By: Kat Kenney, Jeff Hicks, and Carissa Blanco
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